ML20099M448
| ML20099M448 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 08/09/1984 |
| From: | Murphy W VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20099M432 | List: |
| References | |
| FVY-84-99, NUDOCS 8412030397 | |
| Download: ML20099M448 (3) | |
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VERMONT YANKEE
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NUCLEAR POWER CORPORATION FVY 84-99 RD 5, Box 169, Ferry Road, Brattleboro, VT 05301
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FRAMINGHAM, MASSACHUSETTS 01701 August 9, 1984 U.S. Nuclear Regulatory Commission Office of Inspection & Enforcement Region I 631 Park Avenue King of Prussia, PA 19406 Attention:
Richard W. Starostecki, Director Division of Project & Resident Programs
References:
a)
License No. DPR-28 (Docket No. 50-271) b)
Letter, USNRC to VYNPC, dated 7/12/84, and Inspection Report No. 84-10, Appendix.A Notice of Violation
Dear Sir:
Subject:
Response to Inspection Report 84-10 This letter is written in response to Reference b) which indicates that one of our activities was not conducted in full compliance with Nuclear Regulatory Commission requirements.
This alleged Level V violation was identified as a result of an inspection conducted by your Mr. W. Raymond during the period of May 8 - June 4,1984 Information is submitted as follows in answer to the alleged violations contained in the Appendix to your letter.
1T.,E3 A.
Technical Specificatica (TS) 6.5.A requires that detailed written proce-dures, including applicable check-off lists, be prepared, implemented and followed.
Procedure OP 4374 was written pursuant to the above to provide for the periodic calibration end testing of the torus level instrument channels. OP 4374 requires that certain checks be completed and notifica-tions be made to secure from testing following the completion of a channel calibration.
8412030397 841127
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r 1 U,S. Nuclcar Rigulatory Commission August 9, 1984 Paga 2 VERMONT YANKEE NUCLEAR POWER COMPORATION Contrary to the above, testing activities were terminated at 3:45 p.m. on May 8,1984 following a calibration of the torus level instruments and the following actions were not completed in accordance with OP 4374:
recording the final torus level indication to verify it was proper; verifying the high pressure coolant injection pump suction valves were returned to the proper standby alignment; notifying the Shift Supervisor of the test results and the status of testing; and obtaining the Shift Supervisor's review and concurrence that the test results were acceptable.
This is a Severity Level V Violation (Supplement I.E.).
RESPONSE
Calibration of the torus level instrumentation started at 2:45 p.m. on May 8, 1983 and proceeded in accordance with OP 4374. By 3:25 p.m.
testing up to Step 11 of the procedure had been completed and signed off.
Additionally, although not signed off at this time,1) narrow range level instrument readings taken by test personnel at 3:30 and again at 3:45 were found to be satisfactory, and 2) the acceptable condition of annunciators and relays was verified. The system, including the HPCI suction valves, was then returned to an on-line status, with notification made to a Control Room authority at 3:45 p.m.
As is customary and prudent, sign-off of steps 11 through 13 (which in-cludes a final verification that the instruments have been satisfactorily returned to service) was deferred until thermal stabilization of the reference legs could be assured (normally about 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />).
Due to the fact that calibration began late in the day, stabilization would not have occurred until after the end of the shift.
Completion of the pro-cedure was therefore postponed until the following day. OP 4374 does not disallow this; consequently, Vermont Yankee disagrees that a violation of our calibration procedure actually cccurred. We do, however, agree that poor judgement was exercised and that corrective steps should be taken to prevent similar situations from occurring.
As a result, OP 4374 has been changed to include specific instructions for the Torus Water Level Function Test calibration to preclude a recurrence of this event.
In addition, instruction was given to foremen and assistant foremen concerning this issue, with emphasis placed on the importance of knowing the status of equipment at the end of each shift and prior to releasing the system to operations.
Similar discussions were held at department meetings to ensure that technicians and supervisors were made aware of their responsibilities during and after Surveillance Testing.
n U.Se Nuclcar R:gul'atory Comission
. August 9,;_1984 Paga 3-
' VERMONT YANKEE NUCLEAR POWER CORPOHATION r
We trust that this information will be satisfactory; however, should you have any questions or desire additional information, please contact us.
Very truly yours, VERMONT YANKEE NUCLEAR POWER CORPORATION de Y jf Warren P.
urphy V
Vice President and Manager of Operations i
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